Martin Desruisseaux ha scritto:
> Andrea Aime a écrit :
>> I also would like to notice another thing. The current HSQL provider
>> uses more than 4MB or memory to keep a cache of the tables in the
>> DB (that's what the profiler reports, HSQL is the single biggest stable
>> memory user in GeoServer).
>> I find this wasted memory annoying, since most of the GeoServer
>> installations would in fact just use 3-10 CRS, but in an Applet
>> that would be a real killer.
> 
> Yes I noticed that too and I agree that this is a problem. This is one
> additional reason to abandon HSQL in favor of an other database. If H2 has a
> very close API and performs better on memory usage, I'm all for switching to 
> H2
> at least in short term (before the end of this year - we could open a JIRA 
> task
> for that).

It performs better, I have no data memory usage wise. Anyways, I'm going 
to send you the zipped epsg-h2 module, but beware about one thing: the
h2 jar the pom it's referring is 8 months old and it's quite slow 
compared to the last one. I get better performance with the last 
release, not with the one uploaded on the maven repositories.

Plus, there is the "read only db" issue I reported here which makes me
think h2 is not ready for our intended usage:
http://groups.google.com/group/h2-database/browse_frm/thread/ef14b5a50a3d8961

Cheers
Andrea

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